Oscillating joint



IMaly '18, 1937.' R. K. LEE

oscILLATING JOINT Original Filed March 26, 1930 JNVENToR. h. LEE.

BY ATTORNEYS.

Patented May 18, 1937 UNITED STATES PATENT ori-lcs Chrysler Corporation, ration of' Delaware Original application Detroit, Mich.. a corpo- March 26, 1930, Serial No.

439,177. Divided and this application July 27,

1933, Serial N0. 682,359

2 Claims. y(Cl: 29-84) This invention relates to improved oscillating joints. particularly of the type used in springy suspensions and shock absorber riggings of motor vehicles, and is a division of my co-pending application Serial No. 439,177 filed March 26th. 1930.

Heretofore, in oscillating joints of the type which include inner and outer substantially rigid tubular members having a yieldable connecting sleeve, relatively high compression of the yieldable sleeve has been required to secure the rigid members against axial movement. Attempts have also been made to bond rubber sleeves to the adjacent surfaces of the rigid members by vulcanization after the joint is assembled.

In joints of the type in which the yieldable member is compressed to a degree sufllcient to frictionally hold the rigid parts against axiall movement, the relatively high compression required renders the joint substantially rigid and unsuited for use where sensitivity of action is essential. It has also been found that vulcanization of the rubber connecting member to the surface of the rigid members after the joint is assembled relaxes the compression of the rubber, thereby making the joint extremely loose and permitting excessive movement.

The main objects of this invention are to pro-y vide an improved method for securing the metal sleeves of oscillating joints against relative movement without interfering with the required compression oi' the yieldable connecting member thereof; to provide an improved joint having a rubber member rigidly bonded by vulcanization to an inner sleeve and frictionally held against movement relative to an outer sleeve by compression between the two sleeves; to provide a joint oi' this kind which has a yieldable member molded on the inner metal sleeve: and to provide 40 a molded yieldable member in oscillating joints in which provision is made at spaced intervals throughout the length of the joint for accommodating the material of the member that is distorted laterally during compression so as to prevent excessive tensioning of the bond between the inner sleeve and yieldable member at the respectively opposite ends thereof. y

An illustrative embodiment of'this invention is shown in the accompanying drawing, in which:

Fig. 1 is a side elevation of a spring shackle showing an improved oscillating joint in section.

Fig. 2 is a transverse section taken on the line 2-2 of FIS. 1.

Fig. 3 is a vertical section showing a diagrammatic illustration of a device used in assembling oscillating joint. longitudinal section of Joint embodying a modified form n the parts of my improved Fig. 4 is a fragmentary an oscillating of my inventio In the form shown in Figs. l1, 2, and 3, the oscillating joint is illustrated in connection with a spring shackle and includes an outer sleeve I and inner sleeve 2, extend beyond the end portions 3 and 4 of which the extremities of l the outer sleeve I. A bolt 5 passes through the inner sleeve 2 and firmly clamps between a pair the extremities of the inner sleeve of shackle bars 5 and 1. 'I'he outer sleeve I is firmly mounted on an eye 8 formed on the end of a main spring leaf 9. 'I'he ends of the shackle bars Sand 'l are connected by a transversely extending oscillating joint upper which is substantially identical to the joint shown in section in Fig. 1, the outer sleeve I of th being firmly e joint mounted in an eye I0 of a bracket or support I I which is mounted on the chassis frame ofa vehicle (not shown).

AFormed on the outer periphery of the inner 'sleeve 2 is a film or coating of brass I2 on which a rubber sleeve I3 comprising integrally connected rings I4 is molded. I'he sleeve I3 is bonded by vulcanization to the brass coated out face of the inner sleeve 2 and its normal expanded diameter is substantially larger than the inner diameter of the outer sleeve I as illustrated in Fig. 3. When the the assembled lrelation parts of the joint are ln shown in Fig. 1, the rubber sleeve is held undery a substantial compression and the frictional engagement between the latter and the inner periphery of the outer sleeve I prevents relative axial movement between the outer sleeve and the intermediate yieldable Yieldable materials other than rubber an sleeve. d compositions containing rubber may be used to connect the inner and outer sleeves, and if desired the intermediate yieldable member may be secured to the outer periphery of the inner sleeve ment or any suitable means.

by ce- In the form shown in Fig. 4, the oscillating joint includes inner and outer are yieldably connected diate sleeve I3' able material sleeves I and 2 which together by an intermecomprising rubber or other suitwhich is initially of the shape illustrated by dotted lines I 4. The intermediate sleeve I3'l is preferably molded on -theinner sleeve 2 and rigidly other suitable the inner sleeve 2' tial compression by the outer sleeve I'.

canized bond may be conveniently form bonded by vulcanization or any manner to the outer periphery of and is held under a. substan-l AVuled be- CAD 

